Fluid pump or motor



NOV- 5, 1957 R. L. JANSEN 2,811,927

FLUIDPUMP'OR MOTOR Filed April 3, 1956 2 SheeS-Sheet 1 IN VEN TOR.. @Zw/A dame/7 ATTE) RN EYE Nov. 5, 1957 R, L JANSEN 2,811,927

FLUID PUMP OR MOTOR Filed April 5, 1956 2 SheeS-Sheet 2 I N VEN TOR.

,l2/iard L, Janse/7 ATTE RN EYS 2,811,927 Patented Nov. 5, 1957 ffice FLUID PUMP R MOTOR Richard L. Jansen, Oak Ridge, Tenn.

Application April 3, 1956, Serial No. 575,723

1 Claim. (Cl. 103-129) This invention relates to a tluid pump or uid motor.

The object of the invention is to provide a lluid pump or fluid motor which is of small size and wherein close clearances can be maintained throughout the device and wherein there will be no rubbing between the various members.

Another object of the invention is to provide a iluid pump or lluid motor which includes a drive shaft which can be connected to a suitable source of power whereby any suitable huid such as a hydraulic fluid can be pumped with maximum efficiency.

Another object of the invention is to provide a fluid pump or iluid motor which can be used as a hydraulic or pneumatic motor or pump and wherein the pump or motor size can be kept to a minimum and wherein the pump can be fully reversible or of the variable displacement type. v

A further object of the invention is to provide a fluid pump or fluid motor which is extremely simple and inexpensive to manufacture.

Other objects and advantages Will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this application, and in which'like numeral are used to designate like parts throughout the same.

Figure 1 is a longitudinal sectional view taken through the fluid pump or fluid motor.

Figure 2 is a sectional View taken on the line 2 2 of Figure 1.

Figure 3 is a sectional View taken onthe line 3 3 of Figure l.

Figure 4 is a sectional View taken on the line 4 4 of VFigure 2.

Figure 5' is a fragmentary sectional view illustrating the parts in shifted position.

Figure 6 is a sectional View illustrating a modified arrangement.

Figure 7 is a sectional view taken on the line 7 7 of Figure 6.

Referring in detail to the drawings, the numeral 10 designates a drive shaft which includes a first portion 11 and a second portion 12 which is of greater diameter Vthan the lirst portion 11. The shaft 10 further includes a third portion 13 which is of greater diameter than the portion 12, and there is further provided a fourth portion 14 which is of less diameter than the portion 13, Figure 1. Formed integral with an end of the shaft 10 or secured thereto is a support member 15 which includes a pair of spaced apart arms 16 that have a pin 17 extending therethrough. Mounted on the pin 17 is a sleeve 18, and extending outwardly from the sleeve 18 is a leg 19 which carries a gear 20.

The shaft 10 is provided with an interior recess or bore which includes a first portion 21, a second portion 22, and a third portion 23. There is further provided a driven shaft 24 which includes an end section 25 that is seated in the portion 21 of the bore in the shaft 10. The shaft VZ4 further includes an intermediate portion 26 which is arranged in alignment with the portion 22 of the bore in the shaft 10, and the shaft 24 further includes an end section 27 which has a gear 28 thereon, and the gear 28 meshes with thegear 20.; A pluralityof splines 29 may be formed in the portion 26 of the shaft 24.

A housing 30 surrounds the support member 15 and its associated parts, and the housing 30 is hollow and includes spaced apart end walls 31 and 32. The end wal1`32 may be Vprovided with a pair of spaced apart chambers or passageways 33 and 34, Figure 2, for a purpose to be later described.

The end wall 31 of the housing 30 is provided with an oifset recess or socket 35, and a stub shaft `36 is seated `in the socket 35. A bracket 37 is secured to the stub shaft 36, Fig. 2, and the bracket 37 includes a pair of spaced apart ngers 38. Pins 39 extend between the lingers 38, and a sleeve 40 is mounted on the pins 39. A reinforcingrib 41 may extend from the sleeve 40, and the sleeve 40 is integral with the sleeve `18 and leg 19.

There is furtherprovided a casing 42 which includes openings or ports 43 and 44 which may be either inlet or outlet openings. Chambers or compartments 45 and 46 are arranged in the casing 42, Figure 3.

The intermediate portion of the shaft 10 defines a rotor 47 which includes a pair of diametrically opposed lugs48 andr49, Figures land 3. The lugs 48 may be provided with chambers 50 and 51, while the lugs 49 may be provided with `chambers 52 and 53. Extending outwardly from a collar 54 which is keyed to the spline portion 26 of the shaft 24, is a pair of blades or vanes 55 and 56, Figure 3.

A cap 57 is mounted on the second portion 12 of the shaft 10, and thecap 57 is provided with curved charnbers or passageways 58 and 59, Figure 4. Aport 61 communicates with the chamber 58 through the medium of a passageway 60, and also directly with compartment 45.

A `port 63 communicates with the other chamber 59 through the medium of a passageway 62, and also directly with compartment'46. Compartment 45 also communicates with the chamber 33, Figure 2, through a port 73, and a passageway 74. Compartment 46 also communicates with the chamber'34 through a port 75, and a passageway 76.

Referring to Figures 6 and 7 of the drawings there is shown a pump ormotor which is fully reversible, and in Figures 6 and 7 the numeral 64 designates the modified pump or motor. Thus, the pump 64 may include a housing 65 which has a construction that is similar to the previously described housing 30, except that the housing v65 has an end wall 66 which is provided with a socket or recess 67 that receives a stub shaft 68,. A body member 69 extends from the stub shaft 68, kand formed integral with the body member 69 or secured thereto is an ear 70 which is mounted for movement into and out of engagement with a pair of stop members or shoulders 71 and 72.

Suitable bearings can be used wherever desired or required.

From the foregoing, it is apparent that there has Abeen provided a iluid pump or motor and in use, the shaft 10 may have its end portion 11 connected to a suitable source of power in any suitable manner. Thus, the shaft 10 can be rotated when the device is being Yused as a fluidpump. When the shaft 10 rotates, the rotor 47rot'ates andas the rotor 47 turns, fluid can bepumped from a suitable source of supply through the opening 43, and through the chamber 45 and this fluid can be pumped out through the opening 44. The gear 28 meshes with the gear 20 so that there results a relative rotation of the shaft 24 and this causes the vanes 55 and 56 to move from the position shown in Figure 3 whereby during the cycle of operations, vacuum will be created and pressure will be built up so that the fluid will be pumped through the various passageways and ports. Instead of using the device as a fluid pump, it is to be understood that the device can be used as a fluid motor. Thus, when the device is being used as a iluid motor, fluid under pressure can be introduced through the opening 43 and this will result in rotation of the rotor 47 which in turn will cause rotation of the shaft 10, and power from the shaft can be used for any desired purpose.

The iiuid pump or motor of the present invention includes the stationary casing 42 which has the inlet and outlet ports 43 and 44 and ports communicating with chambers 33, 34, 58 and 59 which are arranged so that the fluid pressure balances the rotor 47 whereby rubbing between the members is eliminated. The rotor 47 supports the fulcrum for thespider gear which actuates the shaft gear 28 and the vanes 55 and 56 by oscillating at an angle twice that at which the oiset shaft 36 is displaced angularly with respect to the casing axis. The gear ratio and the said angle determine the relative movement between the rotor lugs 48 and 49 and the vanes 55 and 56. By angularly changing the oiset position of the shaft 36, the pump displacement becomes variable. By letting the offset shaft 36 rotate 180, with its angle to the housing axis lixed around the housing axis, the pump becomes direct reversible. With the modification shown in Figures 6 and 7, the device is automatic and directly reversible.

ln use, it will be seen that the spider gear 20 actuates the shaft gear 28 which causes the vanes 55 and 56 to oscillate between the lugs 48 and 49 of the rotor 47, once for each revolution of the rotor 47.

During the rst half of the revolution, fluid is drawn into the void created by the relative rotation of the vanes with respect to the lugs. Fluid enters between vane 56 and lug 49 through ports 78 and 53 and these ports communicate with chamber 33 which communicates with compartment 45 through passageway 74 and port 73.

Fluid enters between vane 55 and lug 48 through ports 79 and 50 and these ports communicate with chamber 58 which communicate with compartment 45 through passageway 60 and port 61.

Fluid is discharged between vane 56 and lug 48 through ports 77 and 52, and these ports communicate with chamber 34 which communicates with compartment 46 through passageway 76 and port 75. Fluid is discharged between vane 5K5 and lug 49 through ports 52 and 80, and these ports communicate with chamber 59 which communicates with compartment 46 through passageway 62 and port 63.

During the second half of the revolution, uid enters between vane 56 and lug 48 through ports 77 and 51 and these ports communicate with chamber 33. Fluid enters between vane 55 and lug 49 and through ports 80 and 52, and these ports communicate with chamber 58.

Fluid is discharged between vane 56 and lug 49 through ports 78 and 53, and these ports communicate with chamber 34. Fluid is discharged between vane 55 and lug 48 through ports 79 and 50, and these ports communicate with chamber 59.` Chambers 33 and 58 communicate with compartment 45, and chambersp34 and 59 communicate with compartment 46, as previously shown. A

Thus, compartment 45 is a common inlet port and compartment 46 a common discharge port for a pump with a direction of rotation as shown and shaft 36 located as shown in Figure 2.

The vane pump of the present invention has a high mechanical eiciency and pumping is accomplished without rubbing' so that it is ideally suited as a hydraulic or pneumatic motor. Furthermore, due to the concentricity of the pumping members and to the lluid balance, very close clearances can be maintained throughout with a consequent resulting high volumetric eiciency. Since the vane oscillates once for each revolution, the swept volume is one hundred percent larger than that contained between the vanes so that the pump size can be kept to a minimum. Furthermore, no exact Vane shape is necessary whereby manufacturing cost is kept down, and by changing the position of the shafts 36, the pump can be fully reversible or of the variable displacement type.

The chambers 33 and 34 are arranged in the end wall 32 of the housing 30 and the housing may be made in two parts or it may be made in one part. The reversible pump has its inlet and outlet ports remaining as such even though the direction of rotation changes.

I claim:

In a uid pump, a drive shaft including a first portion, a second portion of greater diameter than said tirst portion,a third portion of greater diameter than said second portion, a fourth portion of less diameter than said third portion, a support member extending from said fourth portion and including a pair of spaced apart arms, a pin extending through said arms, a sleeve mounted on said pin and interposed between said arms, a leg extending outwardly from saidsleeve and having a gear member thereon, there being a bore arranged in said drive shaft, said bore including an intermediate enlarged portion, a driven shaft extending rotatably through said bore and including an intermediate splined section, a beveled gear mounted on one end of said driven shaft and meshing with the gear member on said leg, a hollow housing surrounding said support'member and including trst and second end walls, said rst end wall being provided with a recess, a stub shaft seated in said recess, a bracketconnected to said stub shaft, a pin member connected to said bracket, a casing arranged continuous to said housing and provided with fluid inlet and outlet openings, a pair of diametrically opposed lugs extending outwardly from the third portion of said drive shaft and arranged within -said casing, a collar connected to the splined portion of said driven shaft and having a pair of diametrically opposed vanes extending outwardly therefrom, said lugs being provided with chambers and ports therein, said lugs forming part of a rotor, the vanes oscillating between the lugs of the rotor, once for each revolution of the rotor, the second end wall of said housing being provided with a pair of spaced apart chambers therein, a cap mounted on the second portion of said drive shaft and provided with a pair of arcuate chambers, there being passageways in said cap communicating with said last named chambers, said casing being provided with chambers and ports therein communicating with the inlet and outlet openings in said casing.

References Cited in the le of this patent UNITED STATES PATENTS 

